Sailing Dynamics
Title: Sailing Dynamics
DNr: NAISS 2023/5-145
Project Type: NAISS Medium Compute
Principal Investigator: Lars Larsson <>
Affiliation: Chalmers tekniska högskola
Duration: 2023-04-26 – 2024-05-01
Classification: 20303 20306


Since 2015 Chalmers is a National Sports University with obligations to carry out research within Sports and Technology. Three areas have been prioritized: sailing, swimming and equestrian. This proposal is within sailing. Unfortunately, the web page for Sports and Technology has been temporarily removed from , since this site is now rebuilt from scratch. However, a Power Point presentation of the sailing activities may be found at the web address below (very big file, 631 MB). The presentation introduces a large number of finished, ongoing, and planned projects. Until now, the work has resulted in 34 external publications, 2 Licentiate theses, 14 MSc theses, 4 BSc theses and 6 project reports. Almost all work within the center is numerical, so large computer resources are required. Recently, the interest in another branch of sailing has boomed: sail-assisted ships. There are many projects underway internationally, and Sweden has a leading role in this development. With the knowledge gained within the yacht sailing research it is natural to move into this area as well. At present there are two PhD students in Sailing Dynamics. Adam Persson has his focus on Olympic sailing and develops a computational technique, where CFD is used for predicting the behaviour of a sailing yacht in 6 degrees of freedom sailing in waves. This is the most accurate technique ever presented, but it calls for massive computer resources. One computation, i.e. one wind speed, one wind direction and one wavelength, takes around 20k core-hours. It is on the limit of being practically useful at present, but will no doubt be the technique of the future. The technique can also be applied to sail-assisted ships, and during the last part of this PhD project the software will be used for this purpose as well. The second PhD student, Karolina Malmek, works entirely within that area. I should mention that I am retired from Chalmers since 2021-01-01, but have a contract with Chalmers as Professor Emeritus. This means that I can continue to use all Chalmers resources for research, supervision, and teaching, and I have at present three PhD students (one in another area). Adam Persson will finish his PhD in the early fall of 2023 and needs massive computer resources to finalize his computations. Karolina Malmek will obtain her Licentiate degree on 2023-03-31, and will continue in the late fall after maternity leave.